171

FIGURE 171-1

FIGURE 171-2

FIGURE 171-3

FIGURE 171-4

FIGURE 171-5

FINDINGS Figure 171-1. Axial DWI. There is a large isointense mass occupying the trigone and body of the right lateral ventricle (star). Figure 171-2. Right parasagittal T1WI. The large intraventricular mass is hypointense (star) to surrounding white matter (WM). Figure 171-3. Axial FLAIR. The right intraventricular mass is isointense (star). There is mild asymmetry of the lateral ventricles with mild displacement of the septum pellucidum to the left. There is no hydrocephalus. Figure 171-4. Coronal T2WI through the trigones. The mass is hyperintense with myriads punctate and linear hypointense areas. Figure 171-5. Post-contrast axial T1WI. There is avid contrast enhancement with lobulation of the outline of the mass. Some punctate and short linear hypointensities are within the mass.

DIFFERENTIAL DIAGNOSIS Choroid plexus carcinoma (CPC), choroid plexus meningioma, choroid plexus papilloma (CPP).

DIAGNOSIS Choroid plexus papilloma (CPP) WHO I.

DISCUSSION

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